When thinking about childhood growth, most parents often notice the obvious things: shoes getting too small, school uniforms getting tighter, and appetites changing overnight. However, during the primary school years, another important type of growth is happening quietly in the background: brain development.
Between the ages of 5 and 12, children’s brains continue to mature and refine the way they communicate. One important process during this stage is myelination, which helps brain messages travel faster and more efficiently. Think of it like adding insulation around electrical wires. The better the insulation, the easier it is for signals to move quickly and clearly.
This matters because faster brain communication can support everyday skills children use at school, such as listening, concentrating, remembering instructions, solving problems and learning new words. Brain development continues throughout childhood and adolescence, but the primary school years are an important window for building stronger learning foundations.
What is myelination?
Myelination is the process where a fatty protective layer, called myelin, forms around nerve fibres. This helps electrical signals move more efficiently through the brain and nervous system.
As children grow, this “brain wiring” becomes more organised. This supports improvements in processing speed, attention and learning. It does not mean nutrition alone determines school performance, but it does mean children need enough key nutrients to support the brain while it is developing.
Nutrients that support brain development
A balanced diet with foods from the five food groups can help children get the nutrients they need for growth, learning and everyday energy. The Australian Dietary Guidelines recommend children enjoy a variety of foods, including vegetables, fruit, grains, lean proteins, and dairy or alternatives.
Omega-3 fatty acids
DHA is the most common fatty acid in brain cell membranes, making it essential to the nervous function. Food sources include oily fish, eggs, walnuts, chia seeds and flaxseeds.
Iron
Iron supports cognitive development and helps carry oxygen around the body. Low iron can affect energy, concentration and learning. Food sources include lean red meat, chicken, fish, eggs, legumes and fortified cereals. Research has linked iron and iodine deficiencies with poorer cognitive outcomes in school-aged children.
Iodine
Iodine supports growth and brain development through its role in thyroid hormone production. Food sources include seafood, dairy foods, eggs, iodised salt and some breads.
Vitamin B12
Vitamin B12 supports healthy nervous system function. It is naturally found in animal foods such as meat, fish, eggs and dairy. Children following vegetarian or vegan diets may need fortified foods or professional advice to ensure they are getting enough.
Why school food choices matter
For many children, school meals and snacks make up a large part of their daily intake. This means lunch orders are not just about convenience, they also influence energy, concentration and overall diet quality.
By improving food transparency, Nourishubs can show parents what is in their child’s meal, including key nutrients such as protein, carbohydrates, fats, fibre and saturated fat. This helps parents make practical choices that support their child’s growth, learning and wellbeing.
The takeaway
The primary school years are an important time for brain development. During this stage, children’s brains are still wiring, refining and strengthening communication pathways. Nutritious foods cannot replace sleep, movement or learning support, but they do provide important building blocks for healthy brain and nervous system development.
With clearer nutrition information and more balanced school meal options, Nourishubs can help parents make everyday food choices that support children’s energy, learning and long-term health.